CVE-2017-2624

high
New! CVE Severity Now Using CVSS v3

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Description

It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is seen, this causes a time difference between a valid and invalid byte, which could allow an efficient brute force attack.

References

http://www.securityfocus.com/bid/96480

http://www.securitytracker.com/id/1037919

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2624

https://gitlab.freedesktop.org/xorg/xserver/commit/d7ac755f0b618eb1259d93c8a16ec6e39a18627c

https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html

https://security.gentoo.org/glsa/201704-03

https://security.gentoo.org/glsa/201710-30

https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/

Details

Source: MITRE

Published: 2018-07-27

Updated: 2019-10-09

Type: CWE-200

Risk Information

CVSS v2

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3

Base Score: 7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:x.org:xorg-server:*:*:*:*:*:*:*:* versions up to 1.19.4 (inclusive)

Configuration 2

OR

cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

Tenable Plugins

View all (9 total)

IDNameProductFamilySeverity
132218EulerOS 2.0 SP3 : xorg-x11-server (EulerOS-SA-2019-2683)NessusHuawei Local Security Checks
critical
131913EulerOS 2.0 SP2 : xorg-x11-server (EulerOS-SA-2019-2421)NessusHuawei Local Security Checks
critical
104745Debian DLA-1186-1 : xorg-server security updateNessusDebian Local Security Checks
critical
104231GLSA-201710-30 : X.Org Server: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
101949Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities (USN-3362-1)NessusUbuntu Local Security Checks
high
101201SUSE SLES11 Security Update : xorg-x11-server (SUSE-SU-2017:1741-1)NessusSuSE Local Security Checks
high
101059SUSE SLED12 / SLES12 Security Update : xorg-x11-server (SUSE-SU-2017:1675-1)NessusSuSE Local Security Checks
high
100883openSUSE Security Update : xorg-x11-server (openSUSE-2017-710)NessusSuSE Local Security Checks
high
99276GLSA-201704-03 : X.Org: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical